first binary test not complete

tests/create_user_test.rs

@@ -40,3 +40,42 @@ fn test_create_user_function() {
     }
     assert!(pf2.lines().last().unwrap().starts_with("test2"));
 }
+#[test]
+fn test_create_user_binary() {
+    use testfiles::Fixture;
+
+    use adduser::api::UserDBWrite;
+    use adduser::api::UserRead;
+    use std::fs;
+
+    let p = Fixture::copy("passwd");
+    let s = Fixture::copy("shadow");
+    let g = Fixture::copy("group");
+
+    let pf = fs::read_to_string(&p.path).unwrap();
+
+    let mf = adduser::Files {
+        passwd: Some(p.path.clone()),
+        shadow: Some(s.path),
+        group: Some(g.path),
+    };
+
+    let mut db = adduser::UserDBLocal::load_files(mf).unwrap();
+
+    let user_res: Result<&adduser::User, adduser::UserLibError> = db.new_user(
+        adduser::api::CreateUserArgs::builder()
+            .username("test2")
+            // .delete_home(adduser::api::DeleteHome::Delete)
+            .build()
+            .unwrap(),
+    );
+    let pf2 = fs::read_to_string(&p.path).unwrap();
+    assert_eq!(user_res.unwrap().get_username().unwrap(), "test2");
+    let pflines = pf.lines();
+    let pflines2 = pf2.lines();
+    for (l1, l2) in pflines.zip(pflines2) {
+        dbg!(l1, l2);
+        assert!(l1 == l2);
+    }
+    assert!(pf2.lines().last().unwrap().starts_with("test2"));
+}